The Shack-Hartmann wavefront sensor is the most widely used instrument to measure the optical aberrations of the human eye. Traditional Shack-Hartmann wavefront sensors measure the ocular aberrations at a single wavelength, which is usually in the near infrared region of the spectrum. A modified Shack-Hartmann wavefront sensor that simultaneously measures aberrations at three visible wavelengths is discussed. The modified instrument provides a measurement of the longitudinal chromatic aberration of the eye in addition to the monochromatic aberrations provided by the conventional device. Human subjects testing results and the comparison of measured LCA with clinical values are presented.
- Chromatic aberration
- Shack-Hartmann aberrometry
- Wavefront sensing
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics